Earth’s ‘date’ with ‘mysterious’ interstellar comet 3I/ATLAS on Friday – everything to know

Interstellar comet 3I/ATLAS, only the third known object from outside our solar system, will pass closest to Earth on December 19, 2025. Discovered by NASA’s ATLAS telescope in Chile, the fast-moving comet has intrigued scientists with its hyperbolic trajectory, extreme speed and unusual green coma, sparking global scientific interest and ongoing observations.